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LABORATORY 
 
 OF THE 
 
 INLAND REVENUE DEPARTMENT 
 
 OTTAWA. CANADA 
 
 BULLETIN No. 323 
 
 SALTPETRE. 
 
 86955-1 
 
LABORATORY 
 
 INLAND REVENUE DEPARTMENT 
 
 OTTAWA, CANADA 
 
 BULL .iIN No. 323. 
 
 SALTPETRE. 
 
 Ottawa, October 13, 1915. 
 
 J. IT. Vjncent, Esq., 
 
 Deputy Minister Inland Revenue. 
 
 Sir,— I bepr to liand you herewith a report upon one hundred and sixty-six (160) 
 f.anip!es, purehased by our inspectors in April, May and June of this year, a3 Salt 
 petre. 
 
 This term applies to the potassium salt of nitric acid, otherwise known as Niir 
 or nitrate of potash. As a food material it is ehicHy used in pickling meats. In Ihr 
 arts. It IS largely employed for manufacture of jtuniwwder and other explosives; anJ 
 for this reason, as well as bceause the Stassfurt mines of Germany have been in recent 
 years, our <-hu-f s„uree ..f potash, consi.ieralile .iii!ieulty in wcuring supplies of salt- 
 petre exists. 
 
 In conse<iuence of the above facts the sodium salt of nitric acid, commercially 
 known as Chili Saltpetre, is made to supply the place of true saltpetre, wherever such 
 replacement is possible. The hygroscopic character of the sodium salt (Chili Salt- 
 petre) makes It less available for most uses in the arts; but for the purposes of a pickle 
 (hill Saltpetre may be regarded as satisfactory, when properly refined. The physio- 
 logical proiK-rties of the nitrates of potash and soda are, as far as known, practically' 
 identical. 
 
 An official announcement was made in September, 1914, by the Secretary of 
 Agriculture at Washington, to the following elect: 
 
 '• This order ix>rmits the immediate use of nitrate of soda (Chili Saltpetre) in the 
 preparations of meat and food products in establishments where Federal meat inspe.- 
 tion IS maintained." 
 
.1 
 
 While uo ground exinta for ohjc'tiiiK u, the substitution of .sodium nitrate for 
 las^iuni mtrato, eo fiir as Ih,. manuf.ictmo of picivlt is conrcmfd. it r.niuins that 
 ..■ oheaper article (Sodium iiitrnt;) should l.c otr<re<l for sale un.ler its own proper 
 :iino, and should tiot be sold us Salti-.trc. or nitro. ('..a.plainis have been rcniviHl bv 
 M Dopartment .■harffinR that ni.iny .l.aUrs supply the sodium salt under tlw name of 
 .potassium gait (ealtpetre) ai; ! arc thus able to eompete unfairly in the market as 
 ^MiMst those dealers who properly deseribe the article. 
 
 The present report appears to justify the complaint made; and the res- ts of 
 ii-|'"'tion may bo summarized as follows:— 
 
 Kound genuine as Saltpetre lOi) samples. 
 
 Found to be Chili Saltpetre 4<,) « 
 
 i'ound to be mi.Ntures of both 7 " 
 
 Found to be sulphate of soda 1 " 
 
 Total iQQ 
 
 .Sample No. 56451 found to !«.• sulphate of soda (Glauber's Salt) is evidently a 
 nil-take on the part of the vendor. 
 
 1 would respectfully advise publication of this report a.s Bulletin No. 323 It 
 wiil -orTe the purpose of a warning to dealers, and furnish information to the public. 
 
 I hiive tl:e honour to be. Sir, 
 
 Your obedient servant, 
 
 A. McGILL, 
 
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